Would the BRAT diet work for dogs, as well? That's what our pediatrician recommends for my boys when they're having tummy problems. It's Bananas, Rice, Applesauce, & Toast. Thankfully, we haven't ever had to deal with diarehha with either of our pets YET.

I have always just used boiled instant rice and ground beef, all cooked. About 2/3 rice and 1/3 beef.
Of course there is always the quick fix, immodium, though some dogs are sensitive to that medication.

When Nab was sick (my sister fed her candied ginger which killed all the good bacteria in her stomach) the vet had us feed her Pasta or rice and cooked extra lean ground beef. After we cooked the beef we had to rinse it under water to remove as much of the fat as possible. We had to keep her on that until the diarrhea cleared up completely. It was not easy getting her back on her dog food after a week of special cooked meals!

This does not work. The rice soaks up all the water. Now all I have left is mushy rice.

Too much rice in the water. Add more water, boil and run thru blender, food processor or use an emersion blender.